The holiday of Sukkot falls on the Hebrew calendar dates of 15-21 Tishrei. Here are the coinciding secular dates for the upcoming years:
2011: October 12 (at sundown) - 19
2012: September 30 (at sundown) - October 7
2013: September 18 (at sundown) - 25
2014: October 8 (at sundown) - 15
2015: September 27 (at sundown) - October 4
Note: The Jewish calendar date begins at sundown of the night beforehand. Thus all holiday observances begin at sundown on the secular dates listed, with the following day being the first full day of the holiday. Jewish calendar dates conclude at nightfall.
The first two days of Sukkot (from sundown of the first date listed, until nightfall two days later) are full-fledged, no-work-allowed holiday days. The subsequent days are Chol Hamoed, when work is allowed, albeit with restrictions. The final day of Sukkot is known as Hoshana Rabbah.
The holiday of Sukkot is immediately followed by the holiday of Shemini Atzeret/Simchat Torah.
See also:
When is Rosh Hashanah in 2011, 2012, 2013, 2014 and 2015?
When is Yom Kippur in 2011, 2012, 2013, 2014 and 2015?
When is Shemini Atzeret / Simchat Torah in 2011, 2012, 2013, 2014 and 2015?
When is Chanukah in 2011, 2012, 2013, 2014 and 2015?
When is Purim in 2011, 2012, 2013, 2014 and 2015?
When is Passover in 2011, 2012, 2013, 2014 and 2015?
When is Shavuot in 2011, 2012, 2013, 2014 and 2015?
When is the Ninth of Av in 2011, 2012, 2013, 2014 and 2015?